Automatic train-stop.



' H. e. swewlcx. AUTOMATIC TnAm STOP.

APPLICATION FILED JUNE 4 I909. RENEWED ME. I. II"- Patented J un 5, 191

3 MEETS-SHIFT I.

, H- G. SEDGWICK.

- AUTDIAHG mm slow. APHICAflOII FILED US$1.08. IIIEMED DEC. 9, "l5.

"Patented June 5.19m.-

' Y a SNEETS-SMKH a amnnm smaewrex, en mar. arm-mar,

enrromwm, Assrsn'on THE rrrrromtr.

SLFETY APPLIANCE COMPANY, A (IBJOB-A'll-IIION OF CALIFORNIA.

Acronyms rmm-s'rorl Specification of Letters Patent.

Application filed June 4, mom Serial No. 500,l03. llenewedllecemberfl;181B. Serial No. 186,092.

- To azz'whomama em m:

' Be it known 'that I, HinAM G. Snnowrox,"

a citizen of the United States of America,

and a resident of Mill Valley, county of Marin, State of California, have invented Improvements in [Automatic-Train stops, of which the folcertain new and useful lowingis a full and clear specification, refshowing I theretoy v Fig. l'is a detail sectional view ofaa tlied form of vent-piece;

erence being had to the accompanying drawin which 7 ue form of apparatus applied ofi between the storage reservoir and the en- "gineers valve; V

Fig. 2 isa vertical section, partly 1n slde elevatiom'of the arm onthe locomotive car-' rying the removable vent-piece; g Fig. 2is a sectional view showing a modi- Fig. 3 is a vertical longitudinal section showing one of the roadbed shoes or hoods in operative relation to the removable vent- .piece;

. Fig, tie a. vertical section of the-trampipe venting valve and the pneumatic motor adapted to open. and close the same;

Fig. 5 is a detail side elevation of the vent-valve cylinder; 1

Fi 6 is a detail section of the valve whic controls the speed of openingthe vent-valve.

Fig. 7 Ba verticalsectional view of the valve located in the pipe-line for lowering and raising thelaterally projecting'arm on r the locomotive.

Fig. 8 is a diagram'of a portion of ad jace'nt rail blocks showing one possible arrar l gement ofthe road bed system.

he object of this invention is to increase the reliability of the apparatus by doing away with all electric circuits (in the locomotive and by providing means for operat: ing the ventwalve which shall be positively controlled by pressure-from the usual storage reservoir on the locomotive. The in.- vention has other (minor) objects in view which 'will appear in the course, of this specification. a p Referring to the drawings by reference characters, a designates an extensio of the train-pipe which enters the cylindrical vent-valve casin fir-through which works a. plunger: provi ed with a longitudinal port re 1 is a diagram of a locomotiyed in one side-which, when the plunger dey Patented June 5,

sccnds, puts the train-pipe a into communication with the vent e and thus exhausts thetrain-pipe and applies the brakes said vent, e bemgf, preferably of tapering form so that 'the .exhaust will he graduated. While I prefciflthis manner brakes it is obvious that where electrical or of applying the other types of bralges are employed I may storage reservoir 5, and entering said 0 lin- .der below the piston is another pipe 7' ead-.

ing from the train reservoir, the point ofen trance of this latter pipe j belng preferably immediately. below the piston when the same is in its upper or normal position, as shown in Fig. 4. The piston'is held normally up by reason of the'diflerential pressures on its opposite sides, this difference in pressure. be

ing equal to the cross-sectional area .of the plunger 0.

' Entering the bottom of the cylinder f is a pipe is which extendsdownwardly and outwardly through a tubular arm I mounted on the truck of the locomotive and extending horizontally outward beyond 1 the wheels.

This arm 15 provided at its outer end with a pair of separated upstanding fingers m, and the tube 1: is coupled t. its extreme outer end to a transverse'port 'n in the upper end of one ofsaid fingers. is closed by a vent-piece 0 which is clamped over the end of the port and is held suspended between thev fingers m by means of a clamp -screw 72. This removable vent- This port 1: a

piece 0 may be made solid (as shown in Fig.

2) or hollow (as shown in Fig. 2);

It will be observed that when the stopper or valve 0 is knocked out the cylinder 7 will bevented through pipe in. This pipe k is larger in area than the inlet ipe jso that the air will exhaust from un er thepiston g faster than it can enter the same through pipe 7', whereby downwardly by the pressure admitted to the a ply the rakes as heretofore described.

lit

the piston 9 will be forced pipe. j is placed immediately top of the c linder through pipe! and thus i .5 (Of the en We We; The speed 'of (lQS :ent of 5 piston J May be regulated by the needlevulve q in pipe it, and in mgdei-q the't'the'f motn1' c-unno't by any ms'sihi'lit'y he rendered irmp-ei atii'e by t lieeiusing (if this \alve the serew viilve. stem is provided \\'itl 1 1l .Sl]0Ll-lder "1' which is adapted to' abut against an i-ntei'nul,shoulder iii the alve-casing and prevent the valve being entirely closed, as Sl-I'OM'H lfl Fig. (in

The piston f/ aml plunger 0 may he raised 15 in their normal 0 si'li0n. after 'anioperatinn, In. any suitable meansbut I prefer to employ. rest-Heir pressin'e'te reetm'e the parts m 8" and hdlc'ls' it; 'open while" the piston "at tjh' loiver extremity df its stroke. After 5 bee s ew d by (1- valve 1; agz'lj-nstieser'ioi ',pressuue ttl'i'at said valve is 11 p. a al '0 l ting-Oi: v v

pnsitiqn. One example of" l'nea'ns for l'uingtlus' 1's shnwn' Ill Fig. 4. The

the plun er n. X vsimple form cnnsi'sts 0' 'a' plunger-like extensiq 'dfo Q P 1V 'w'k' ng. tlirs v: im y i der e" inserted]-ii'l the pe a, s '(1 plun' '91. (l being provided'witl i (smur an annular p0 f which when the plung'ei is up gives a-fp'ee massage of tlji'hilt-through pipe a but which \\"hen"thel phihgeudescends closespipe a. At one .a'iile'sfllll pert f is provided (than llpWllHi extension g which when the plunger descends puts the iteservui-r in'eommupication with ii whistle/t i uther'audible alarm and thus eunse's 'iICOBtiDilOU'S alarm to sounded while the hrakesai'e on.

, Any suitable means may be mounted on the r'eznlhed' git 'diinger points to knock out the vent pieces 0. I ii'efm" the means sh'n'u'n in any (m-pendingapplication Serial Nu. limeififig l-m sistingef casings mounted at intervals along ithe Jmudhed and ea'c-h provided with a magnetically (.idriiroll'ed' ;mn'iu ting hook if adapt-ed \*he;n set to 1am,- gerto ilepeml'th mgh a slot in the? lbflt tbm of 'lhe easing. This hook i" is :iitflclied to pimtml :ii'n1atln'e insu'lat'eclly supportetlpn the lmttmn (If t 1e easing} in the-present ii'istunee'. This armature and itshook is include-(Yin the nmm a'lly-elesed circuit with J the; magnet [CI-5 mul -0f the \Yi-resbeing attached to the hook near'its .e.\,.tre n 1it y and the other l'ieing'.erifipeeted to t h'e armature lite-11y suitirhl-e pbihitw The this.-

Wining fl PlflngCHIEili QlS to cause thecs -gnaiideany heeln'plofl any ether lis u pt i jig in. i

that may hei'in *theszu nde-ii cu I danger in ease. the paint of-"the l-ieq sh d heeome'broken-efi und thus endrdiil feetlve in buekin g, hut this-dill) will operate in mmieetimiw tlj i rupting ht 'bks {i1 h-ere this 11-1111 iii-rang" it may be lowered sufficiently to bring the For this purpose I so-mount the'arm I that part out of alinement with the set hooks.

The inner end of the arm Z is provided with a cross-head n which is supported upon 480,900 and 498,453.

' the upper'end of a piston rod 0 attached to a piston 12 working in a vertic cylinder Q'l'l'l0l11'lt0d0ll the truck. Reservoir ressure is supplied under this piston to ormally hold it up by means of a pipe 1' which is "connected to pipe (1' through a alve a.

This valve may be of any suitable constructron such for instance, as that shown in my (o-pendingapplication Serial No. 498,453.

Air normally passes through this valve but when its-=-plug is rotated toward the cab through- -themed' of its depending arm 6 the supply frome u will be cut off and pipe 1- will Beexhaiisted to the air and thus lower the arm'l. Valve arm 23' may be operated in any suitable way aslior instance, by an angle-lever u, connected by a wire or rod u to an arm on theusual cutoff 20. By means of thecut-ofl' w the en gineer can cut out his control-valve entirely when running tandem and, at theisanie time, he will render the automatic devices on his locomotive inoperati vei lio lgeep tab on the thing engineer a register a may be attached to the Wire '0 so as to'make a record of evrry time the automatic devices are thrown to'inoperative position.

I make no claim inthis application to any- I covered by claims in my co-pending "applications serially numbered respectively,

Having thus fully described vvmy invention, what I claim as new and desire to secure by Letters Patent, is: s- In an automatic train sto trolling means on the locgiotive, a pneumatic motor for operating the same and means for connecting the motor to a stor' age reservoir means for governing the supply to the motor to cause the same to operate and apply the brakes, means for restoring the motor to operative position, these means embodying a out off automaticallt opened am closed by the action of the motor. V i

In testimony whereof I hereunto aflix my signatl ire in the presence of two witnesses this 4th day of June, 1900.

I'IIRAM GEE SEDGWIGK.

\Vitnesses CHARLES D. DAVIS CiiAnnns LOWELL IfOWARD.

, a brake con- 

